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Gut. 1988 April; 29(4): 516–521.
PMCID: PMC1433529

Ulcerative colitis--a disease characterised by the abnormal colonic epithelial cell?


The leakiness of the cell membranes of colonic epithelial cells isolated by the collagenase/Dispase technique from normal or diseased colons was assessed in a 4 h 51Cr release assay. Cells from normal, adenoma bearing or cancer bearing colons showed 51Cr release of 8% or less in almost all of 46 cell populations tested. In contrast, cells from mucosa affected by ulcerative colitis [11.9 (4.3%) n = 23] or Crohn's disease [8.4 (2.7%) n = 18] released significantly more 51Cr than the non-inflamed groups. Values are expressed as mean (SD). Overall, release values were greater in ulcerative colitis than Crohn's disease (p less than 0.01). In Crohn's disease, cells obtained from histologically inflamed mucosa released significantly more 51Cr [9.7 (2.5%) n = 11] than those from non-inflamed mucosa [6.4 (1.5%) n = 7, p less than 0.02] whereas, in ulcerative colitis, abnormal release values were found in 8 of 13 cell populations isolated from mucosa showing no histological evidence of active disease. In five patients with distal ulcerative colitis, cells from mucosa not apparently involved demonstrated normal 51Cr release in four of five studies despite abnormal release from cells from involved mucosa suggesting that a diffuse abnormality of the colonic epithelial cell is not usually present. These data indicate that chronic mucosal inflammation per se is associated with abnormalities of the colonic epithelial cell but that, in ulcerative colitis, the abnormality remains in many patients with quiescent disease. Identification of the local factors responsible for such an abnormality may contribute to an understanding of the pathogenesis of ulcerative colitis.

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Selected References

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